1201121110 has 64 divisors (see below), whose sum is σ = 2536694784. Its totient is φ = 400982400.

The previous prime is 1201121099. The next prime is 1201121113. The reversal of 1201121110 is 111211021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438445 + ... + 441175.

It is an arithmetic number, because the mean of its divisors is an integer number (39635856).

Almost surely, 2^1201121110 is an apocalyptic number.

1201121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201121110 is an abundant number, since it is smaller than the sum of its proper divisors (1335573674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201121110 is a wasteful number, since it uses less digits than its factorization.

1201121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1201121110 is about 34657.1942026472. The cubic root of 1201121110 is about 1062.9893987185.

Adding to 1201121110 its reverse (111211021), we get a palindrome (1312332131).

The spelling of 1201121110 in words is "one billion, two hundred one million, one hundred twenty-one thousand, one hundred ten".